Search for high mass dijet resonances with a new background prediction method in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
Search for high mass dijet resonances with a new background prediction method in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
复制标题
使用新的背景预测方法在 $$ sqrt{s} $$ = 13 TeV 的质子-质子碰撞中搜索高质量双喷射共振
DOI：
10.1007/jhep05(2020)033
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发表时间：
2020
影响因子：
5.4
通讯作者：
Sirunyan A
中科院分区：
文献类型：
--
作者：
Sirunyan A
对质量大于1.8TeV的窄共振和宽共振衰变为一对喷注进行了探索。这次搜索使用了在大型强子对撞机上收集的=13TeV的质子-质子碰撞数据，对应的积分光度为137FB−1。用以前出版物中使用的拟合方法和一种新的方法预测了标准模型过程产生的背景。这两种数据驱动的方法都很好地描述了双喷流不变的质谱图，并且没有观察到新粒子产生的重要证据。报道了窄共振和宽共振的产生截面与模型无关的上限，其宽度可达共振质量的55%。给出了来自各种模型的窄共振质量的限制：弦共振、标量双夸克、轴子、色子、激发夸克、色八重标量、W‘和Z’玻色子、兰德尔-桑德鲁姆引力子和暗物质介体。窄共振的极限比以前的CMS DiJet共振搜索中报告的那些提高了200到800 GeV。暗物质介体的极限是共振质量和宽度的函数，而相关的耦合强度是介体质量的函数。这些限制以95%的置信度排除质量为1.8TeV且宽度为其质量的1%或更高的暗物质介体，直到质量为4.8TeV且宽度为其质量的45%或更高的暗物质介体。
A search for narrow and broad resonances with masses greater than 1.8 TeV decaying to a pair of jets is presented. The search uses proton-proton collision data at= 13 TeV collected at the LHC, corresponding to an integrated luminosity of 137 fb− 1. The background arising from standard model processes is predicted with the fit method used in previous publications and with a new method. The dijet invariant mass spectrum is well described by both data-driven methods, and no significant evidence for the production of new particles is observed. Model independent upper limits are reported on the production cross sections of narrow resonances, and broad resonances with widths up to 55% of the resonance mass. Limits are presented on the masses of narrow resonances from various models: string resonances, scalar diquarks, axigluons, colorons, excited quarks, color-octet scalars, W′ and Z′ bosons, Randall-Sundrum gravitons, and dark matter mediators. The limits on narrow resonances are improved by 200 to 800 GeV relative to those reported in previous CMS dijet resonance searches. The limits on dark matter mediators are presented as a function of the resonance mass and width, and on the associated coupling strength as a function of the mediator mass. These limits exclude at 95% confidence level a dark matter mediator with a mass of 1.8 TeV and width 1% of its mass or higher, up to one with a mass of 4.8 TeV and a width 45% of its mass or higher.
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影响因子：
5.4
作者：
S. Dittmaier;A. Huss;C. Speckner
通讯作者：
S. Dittmaier;A. Huss;C. Speckner
影响因子：
5.5
作者：
Boveia, Antonio;Buchmueller, Oliver;Zurek, Kathryn
通讯作者：
Zurek, Kathryn
影响因子：
2.8
作者：
Ball, Richard D.;Bertone, Valerio;Ubiali, Maria
通讯作者：
Ubiali, Maria
影响因子：
5.5
作者：
Abercrombie, Daniel;Akchurin, Nural;Zucchetta, Alberto
通讯作者：
Zucchetta, Alberto